Enamel



PATENT OFFICE. 4

UNITED STATES.

WILLIAM A. BRIGGS, OF PHILADELPHIA, PENNSYLVANIA.

Patented Mar. 21, 1922.

ENAMEL.

1,409,919 Specification of Letters Patent.

No Drawing. Application filed August 24, 1920. Serial No. 405,715.

To all whom it may concern:

' Be it known that 1, WILLIAM A. Bmeos, a subject of the King of Great Britain, residing at Philadelphia,- in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Enamel, of which the followm is a specification.

%ne object of my invention is to provide an enamel which is virtuall a solid fusible paint and provides a bar glossy surface impervious to all climatic influences and which possess unusual and hitherto unattained durability.

The composition of my improved enamel consists of from .25 to 55- parts by weight of a gum-resin of a high melting point such for example as copalgum or coumarone resln (synthetic coal tar resin), 5 to parts by weight of rosin, (colophony), 10 to parts by weight filler such as whiting or finely ground silicate and pigment such as iron oxide, lithophone or chrome reen and 10 to 35 parts by weight vegetable or mineral oil.

My improved composition enamel is prepared b melting, by the application of heat, the fusi 1c in redients such as the gum-resin and rosin an stirring in the solids such as the pigments and fillers and the addition of oil to gain the consistenc and hardness desired, said oil being use as a softening oil for the resin giving flexibility to the mass.

The enamel must be applied on a primary coating such for example as on a primary coating of varnish or paint which dries at ordinary atmospheric conditions preferably within forty-eight hours. I do not specifically confine my invention to the composition of this primary coating since many modifications are possible, but claim the application of the above enamel as described on any primary coating such for example as above specified; the enamel being applied in a hot molten state.

I have found that an enamel made in accordance with the above is virtually that of a solid fusible paint which produces a hard glossy surface. impervious to all climatic'in fiuences and which possesses unusual and previously unattained durability.

In the claims I have used the term filling material and such term is meantto imply a filler and a pigment as above set forth or either a filler or a pigment.

Having thus described my invention, what I claim as new and-desire to secure by Letters Patent is 1. A fusible solid anti-corrosive com osition including gum-resin of a high me ting point, rosin, filling material and oil.

2. A composition enamel including 25 to 55 parts by weight of a gum-resin of a high melting point, 5 to 35 parts by weight of rosin, 10 to 40 parts by weight of fillin material, and 10 to 35 parts by weight of oi 3. A fusible solid anti-corrosive composition including copal gum, rosin, filling material, and oil.

4. A composition enamel including 25 to 55 parts by weight of copal gum, 5 to 35 parts by weight of rosin, 10 to 40 parts by weight of filling material, and 10 to 35 parts by weight of oil.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM A. BRIGGS.

l/Vitnesses:

ELIZABETH GARHE, CHAS. E. Po'rrs. 

